Improved Build and CI Support

The Imixs-Workflow project has now joined the Travis CI platform. With this CI and Build plattform the current build status of Imixs-Workflow can be easily monitored by the community. This increases the transparency and stability of our open source project. This Travis CI runs all the tests of the Imixs-Workflow and Imixs-BPM automatically. The check-in of pull requests will also be monitored. Committing improvements and bug fixes by the community becomes now easier.